Huawei ME909u-521: unable to get GPS data

Aleksander Morgado aleksander at aleksander.es
Fri May 30 04:33:02 PDT 2014


On 29/05/14 21:55, Yegor Yefremov wrote:
>>> Has anyone experience with this LTE card? "GSM" stuff is working, but
>>> >> I can't get GPS, i.e. if I issue "AT^WPDGP" like shown here
>>> >> http://openbsd.7691.n7.nabble.com/Huawei-EM770W-modem-in-GPS-mode-td78042.html,
>>> >> I get NMEA data on /dev/ttyUSB3, but it's empty even after several
>>> >> minutes:
>>> >>
>>> >> $GPVTG,,T,,M,,N,,K,N*2C
>>> >> $GPGSA,A,1,,,,,,,,,,,,,,,*1E
>>> >> $GPGGA,,,,,,0,,,,,,,,*66
>>> >> $GPRMC,,V,,,,,,,,,,N*53
>> >
>> > It can take a long time to get a fix without A-GPS, which may or may not
>> > be active here.  The first thing I would do is wait longer (10 minutes?)
>> > before giving up.  Also, are you able to test the same device under
>> > Windows, to see if the GPS there actually works and to establish a
>> > baseline for time-to-fix?
> I was also going to try Windows driver. I hope I will be able to find them.
> 
> Getting a fix is another question, but I should at least see some
> satellites after relative short period of time. Other cards, like
> Sierra or Ericsson see some satellites at once.

Also, make sure you've connected the antenna to the proper connector, in
case it has multiple of them.

-- 
Aleksander
https://aleksander.es


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